/**
 * Copyright 2009 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package org.waveprotocol.wave.examples.fedone.crypto;

import com.google.inject.ImplementedBy;

import java.util.Date;

/**
 * Interface for obtaining the current time. We extract this interface for
 * easier testing. There should be no need to replace the default implementation
 * of this interface, except for testing.
 */
@ImplementedBy(DefaultTimeSource.class)
public interface TimeSource {

  /**
   * Returns a {@link Date} representing the current time.
   */
  public Date now();

  /**
   * Returns the current time in milliseconds sice the epoch UTC
   */
  public long currentTimeMillis();
}
